Case study · Insurance
How an Insurance Platform Modernised Legacy Java Services
The monolith was stable but slow to change. An incremental modernisation plan reduced risk.
Illustrative engagement scenario — names and details are representative of typical client situations.
- Client
- Insurance technology platform
- Industry
- Insurance
- Location
- United Kingdom
- Roles hired
- 3 Java developers, 1 DevOps engineer, 1 QA engineer
- Engagement
- Full-time, ongoing
Java 17upgrade completed
Incrementalservice extraction
Automatedregression tests on critical flows
The challenge
A legacy Java monolith made releases slow and risky, but a full rewrite was considered too dangerous.
The solution
The team added tests around critical flows, upgraded to Java 17, introduced CI/CD and extracted services gradually using the strangler pattern.
Steps
- Characterisation tests.
- Java and Spring upgrades.
- CI/CD and observability.
- Strangler-pattern extraction.
Lessons
Tests and observability first made every later change safer.
See Java developers.
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